MethodBase.GetCurrentMethod Metodo

Definizione

Restituisce un oggetto MethodBase che rappresenta il metodo attualmente in esecuzione.Returns a MethodBase object representing the currently executing method.

public:
 static System::Reflection::MethodBase ^ GetCurrentMethod();
public static System.Reflection.MethodBase GetCurrentMethod ();
static member GetCurrentMethod : unit -> System.Reflection.MethodBase
Public Shared Function GetCurrentMethod () As MethodBase

Restituisce

GetCurrentMethod() è un metodo statico che viene chiamato dall'interno di un metodo in esecuzione e che restituisce informazioni su tale metodo.GetCurrentMethod() is a static method that is called from within an executing method and that returns information about that method.

Oggetto MethodBase che rappresenta il metodo attualmente in esecuzione.A MethodBase object representing the currently executing method.

Eccezioni

Questo membro è stato richiamato con un meccanismo di associazione tardiva.This member was invoked with a late-binding mechanism.

Esempi

Nell'esempio seguente vengono definiti due tipi.The following example defines two types. Il primo è una classe non generica, TestClass, include un costruttore, un metodo denominato GetValuee una proprietà di lettura/scrittura denominata GetValue.The first is a non-generic class, TestClass, includes a constructor, a method named GetValue, and a read-write property named GetValue. Il secondo è una classe generica TestClass<T> denominata che include un costruttore, GetValue un metodo ConvertValue<Y>e un metodo generico.The second is a generic class named TestClass<T> that includes a constructor, a GetValue method, and a generic method, ConvertValue<Y>. Ogni funzione di accesso di costruttore, metodo e proprietà include una chiamata GetCurrentMethod al metodo.Each constructor, method, and property accessor includes a call to the GetCurrentMethod method.

using System;
using System.Reflection;

public class Example
{
   public static void Main()
   {
      var t = new TestClass();  
      Console.WriteLine(t.GetValue());
      t.Value = 10;
      Console.WriteLine(t.Value);
      Console.WriteLine();
      
      var tg =new Test<int>(200);
      Console.WriteLine(tg.GetValue());
      var b = tg.ConvertValue<Byte>();
      Console.WriteLine("{0} -> {1} ({2})", tg.GetValue().GetType().Name,
                        b, b.GetType().Name);
   }
}        

public class TestClass
{
   private Nullable<int> _value;
   
   public TestClass()
   {
      MethodBase m = MethodBase.GetCurrentMethod();
      Console.WriteLine("Executing {0}.{1}", 
                        m.ReflectedType.Name, m.Name);
   }
   
   public TestClass(int value)
   {
      MethodBase m = MethodBase.GetCurrentMethod();
      Console.WriteLine("Executing {0}.{1}", 
                        m.ReflectedType.Name, m.Name);
      _value = value;
   }
   
   public int Value
   {  
      get {
         MethodBase m = MethodBase.GetCurrentMethod();
         Console.WriteLine("Executing {0}.{1}", 
                           m.ReflectedType.Name, m.Name);
         return _value.GetValueOrDefault();
      }
      set {
         MethodBase m = MethodBase.GetCurrentMethod();
         Console.WriteLine("Executing {0}.{1}", 
                           m.ReflectedType.Name, m.Name);
         _value = value;
      }
   }
   
   public int GetValue()
   {
      MethodBase m = MethodBase.GetCurrentMethod();
      Console.WriteLine("Executing {0}.{1}", 
                        m.ReflectedType.Name, m.Name);
      return this.Value;
   }
}

public class Test<T>
{
   private T value;
   
   public Test(T value)
   {
      MethodBase m = MethodBase.GetCurrentMethod();
      Console.WriteLine("Executing {0}.{1}", 
                        m.ReflectedType.Name, m.Name);
      this.value = value;
   }
   
   public T GetValue()
   {
      MethodBase m = MethodBase.GetCurrentMethod();
      Console.WriteLine("Executing {0}.{1}", 
                        m.ReflectedType.Name, m.Name);
      return value;
   }
   
   public Y ConvertValue<Y>() 
   {
      MethodBase m = MethodBase.GetCurrentMethod();
      Console.WriteLine("Executing {0}.{1}", 
                        m.ReflectedType.Name, m.Name);
      Console.Write("      Generic method: {0}, definition: {1}, Args: ", 
                        m.IsGenericMethod, m.IsGenericMethodDefinition);
      if (m.IsGenericMethod) {
         foreach (var arg in m.GetGenericArguments())
            Console.Write("{0} ", arg.Name);
      }
      Console.WriteLine();
      try {
         return (Y) Convert.ChangeType(value, typeof(Y));
      }
      catch (OverflowException) {
         throw; 
      }   
      catch (InvalidCastException) {
         throw;
      }   
   }   
}
// The example displays the following output:
//       Executing TestClass..ctor
//       Executing TestClass.GetValue
//       Executing TestClass.get_Value
//       0
//       Executing TestClass.set_Value
//       Executing TestClass.get_Value
//       10
//       
//       Executing Test`1..ctor
//       Executing Test`1.GetValue
//       200
//       Executing Test`1.ConvertValue
//             Generic method: True, definition: True, Args: Y
//       Executing Test`1.GetValue
//       Int32 -> 200 (Byte)
Imports System.Reflection

Module Example
   Public Sub Main()
      Dim t As New TestClass()  
      Console.WriteLine(t.GetValue())
      t.Value = 10
      Console.WriteLine(t.Value)
      Console.WriteLine()
      
      Dim tg As New Test(Of Integer)(200)
      Console.WriteLine(tg.GetValue())
      Dim b = tg.ConvertValue(Of Byte)()
      Console.WriteLine("{0} -> {1} ({2})", tg.GetValue().GetType().Name,
                        b, b.GetType().Name)
                                            
                                             
   End Sub
End Module

Public Class TestClass
   Private _value As Nullable(Of Integer)
   
   Public Sub New()
      Dim m As MethodBase = MethodBase.GetCurrentMethod()
      Console.WriteLine("   Executing {0}.{1}", 
                        m.ReflectedType.Name, m.Name)
   End Sub
   
   Public Sub New(value As Integer)
      Dim m As MethodBase = MethodBase.GetCurrentMethod()
      Console.WriteLine("   Executing {0}.{1}", 
                        m.ReflectedType.Name, m.Name)
      _value = value
   End Sub
   
   Public Property Value As Integer
      Get
         Dim m As MethodBase = MethodBase.GetCurrentMethod()
         Console.WriteLine("   Executing {0}.{1}", 
                           m.ReflectedType.Name, m.Name)
         Return _value.GetValueOrDefault()
      End Get
      Set
         Dim m As MethodBase = MethodBase.GetCurrentMethod()
         Console.WriteLine("   Executing {0}.{1}", 
                           m.ReflectedType.Name, m.Name)
         _value = value
      End Set
   End Property
   
   Public Function GetValue() As Integer
      Dim m As MethodBase = MethodBase.GetCurrentMethod()
      Console.WriteLine("   Executing {0}.{1}", 
                        m.ReflectedType.Name, m.Name)
      Return Me.Value
   End Function
End Class

Public Class Test(Of T)
   Private value As T
   
   Public Sub New(value As T)
      Dim m As MethodBase = MethodBase.GetCurrentMethod()
      Console.WriteLine("   Executing {0}.{1}", 
                        m.ReflectedType.Name, m.Name)
      Me.value = value
   End Sub
   
   Public Function GetValue() As T
      Dim m As MethodBase = MethodBase.GetCurrentMethod()
      Console.WriteLine("   Executing {0}.{1}", 
                        m.ReflectedType.Name, m.Name)
      Return value
   End Function
   
   Public Function ConvertValue(Of Y)() As Y
      Dim m As MethodBase = MethodBase.GetCurrentMethod()
      Console.WriteLine("   Executing {0}.{1}", 
                        m.ReflectedType.Name, m.Name)
      Console.Write("      Generic method: {0}, definition: {1}, Args: ", 
                        m.IsGenericMethod, m.IsGenericMethodDefinition)
      If m.IsGenericMethod Then
         For Each arg In m.GetGenericArguments()
            Console.Write("{0} ", arg.Name)
         Next
      End If
      Console.WriteLine()
      Try
         Return CType(Convert.ChangeType(value, GetType(Y)), Y)
      Catch e As OverflowException
         Throw 
      Catch e As InvalidCastException
         Throw
      End Try   
   End Function   
End Class
' The example displays the following output:
'       Executing TestClass..ctor
'       Executing TestClass.GetValue
'       Executing TestClass.get_Value
'       0
'       Executing TestClass.set_Value
'       Executing TestClass.get_Value
'       10
'       
'       Executing Test`1..ctor
'       Executing Test`1.GetValue
'       200
'       Executing Test`1.ConvertValue
'             Generic method: True, definition: True, Args: Y
'       Executing Test`1.GetValue
'       Int32 -> 200 (Byte)

Commenti

Se il metodo attualmente in esecuzione è definito su un tipo generico, l' MethodInfo oggetto restituito da GetCurrentMethod viene ottenuto dalla MethodBase.ContainsGenericParameters definizione di tipo generico, ovvero restituisce true.If the currently executing method is defined on a generic type, the MethodInfo that is returned by GetCurrentMethod is obtained from the generic type definition (that is, MethodBase.ContainsGenericParameters returns true). Pertanto, non riflette gli argomenti di tipo utilizzati quando è stato chiamato il metodo.Therefore, it does not reflect the type arguments that were used when the method was called. Se, ad esempio, un M() metodo viene definito su un tipo C<T> genericoC(Of T) (in Visual Basic GetCurrentMethod ) e GetCurrentMethod viene chiamato da C<string>.M(), restituisce C<T>.M() (C(Of T).M() in Visual Basic).For example, if a method M() is defined on a generic type C<T> (C(Of T) in Visual Basic), and GetCurrentMethod is called from C<string>.M(), then GetCurrentMethod returns C<T>.M() (C(Of T).M() in Visual Basic).

Se il metodo attualmente in esecuzione è un metodo generico, GetCurrentMethod restituisce la definizione di metodo generica.If the currently executing method is a generic method, GetCurrentMethod returns the generic method definition. Se il metodo generico è definito su un tipo generico, la MethodInfo viene ottenuta dalla definizione di tipo generico.If the generic method is defined on a generic type, the MethodInfo is obtained from the generic type definition.

Sicurezza

ReflectionPermission
Quando viene richiamato ad associazione tardiva tramite InvokeMember(String, BindingFlags, Binder, Object, Object[], ParameterModifier[], CultureInfo, String[])meccanismi come.when invoked late-bound through mechanisms such as InvokeMember(String, BindingFlags, Binder, Object, Object[], ParameterModifier[], CultureInfo, String[]). Enumerazione associata: MemberAccess.Associated enumeration: MemberAccess.

Si applica a